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Finding the Fourth Proportional to 995.59, 1,373.51 and 680.35

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Solution

The fourth proportional to 995.59, 1,373.51 and 680.35 is: 938.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.59 : 1,373.51 = 680.35 : x
  2. Step 2: Convert to fraction form
    995.59/1,373.51 = 680.35/x
  3. Step 3: Cross multiply
    995.59x = 1,373.51 × 680.35
  4. Step 4: Simplify right side
    995.59x = 934,467.53
  5. Step 5: Solve for x
    x = 934,467.53/995.59
  6. Step 6: Final answer
    x = 938.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.